What Is Ashura?

Description:
Provides an explanation of the "day of Ashura [which] is marked by Muslims as a whole, but for Shia Muslims it is a major religious festival which commemorates the martyrdom at Karbala of Hussein, a grandson of the Prophet Mohammad. It falls on the 10th of Muharram, the first month of the Islamic lunar calendar." Includes links to related articles about Shia Muslims. From BBC News.